User manual
12
Release Notes for Catalyst 6500 Series Content Switching Module Software Release 2.2(8)
78-12569-16
Caveats
• CSCdz12163
The CSM drops packets because the multilayer switch (MLS) card and the multilayer switch feature
card (MSFC) use different MAC addresses. This problem remains in software releases prior to the
Catalyst 7.5.1 software release. If any Supervisor Engine 2 in the switch is still running a software
release prior to the 7.5.1 software release and the traffic is forwarded by that switch, the CSM drops
the packet.
Workaround: None.
• CSCdy88197
During a CSM reset, the show module command displays the module as faulty when it should be
displayed as “Other.”
Workaround: None.
• CSCdy80501
FTP virtual server IP addresses cannot also be client NAT IP addresses. If there is an overlap
between the IP address range for a virtual server on which ‘service ftp’ is configured and a
configured client NAT IP address range, connections through that virtual server are not handled
properly.
Workaround: Configure the FTP virtual server IP address and client NAT addresses to ensure that
there is no address overlap.
• CSCdy79826
When Internet Group Management Protocol (IGMP) snooping is enabled on the Catalyst 6500 series
switch, some CSM connection replication frames may be dropped. When you use the CSM
connection replication feature, you must disable IGMP snooping on both the active and standby
CSM modules.
Workaround: To disable IGMP snooping, use the no ip igmp snooping command in global
configuration submode on the Catalyst 6500 series switch.
• CSCdy71303
TCL script probes are sensitive to network overload, congestion, and delay.
Workaround: To avoid spurious health monitoring results in which real servers are considered
unhealthy due to network delay or congestion, we recommend that you set the “retry” value greater
than 1 for all TCL script probes.
• CSCdy64647
Established FTP connections are not replicated to the standby CSM when the standby becomes
operational. To enable an FTP connection for replication from an active CSM to a standby CSM, the
standby CSM must be operational at the time the FTP connection is opened. If the FTP connection
is opened prior to the standby CSM booting and becoming operational, the FTP connection never
replicates to the backup.
Workaround: None.
• CSCdy32262
For optimal performance of CSM TCL script probes and TCL standalone scripts, we recommend the
following:
a. Avoid using asynchronous sockets. For example, avoid calling the socket command with the
-async option.
b. Avoid calling the gets command. Use the read command instead.
c. Avoid using the TCL fileevent command.